<template>
    <el-container class="home-container">
        <!--头部区域-->
        <el-header>
            <div>
                <img src="src\assets\heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!--页面主体内容-->
      <el-container>
          <!--侧边栏-->
    <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF"
      unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
      <!--一级菜单-->
      <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
          <!--一级菜单模板区域-->
        <template slot="title">
            <!--图标，根据item的id遍历图标赋予每一栏-->
          <i :class="iconsObj[item.id]"></i>
          <!--文本-->
          <span>{{item.authName}}</span>
        </template>
        <!--二级菜单-->
        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
             <template slot="title">
            <!--图标-->
          <i class="el-icon-menu"></i>
          <!--文本-->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
      
    </el-menu>
    </el-aside> 
      <!--右侧内容主体-->
      <el-main>
          <!--路由占位符-->
          <router-view></router-view>
      </el-main>
     </el-container>
    </el-container>
</template>
  
  <style lang="less" scoped>
  .el-header{
      background-color: #373d41;
      display: flex;
      justify-content: space-between;
      padding-left:0 ;
      align-items: center;
      color:#fff;
      font-size: 20px;
      .div{
          display: flex;
          align-items: center;
          span{
              margin-left:15px ;
          }
      }
  }
  .el-aside{
      background-color: #333744;
      .el-menu{
          border-right: none;
      }
     
  }
  .el-main{
      background-color: #eae1fd;
  }
  //图标与文字说明的距离
  .home-container{
      height: 100%;
  }
  .iconfont{
      margin-right: 10px;
  }
  //左侧菜单的折叠与展开功能按钮
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
  
  </style>
  


  <script>
  export default{
      data(){
         return{
          //左侧菜单数据
          menulist:[],
          iconsObj:{
            '125':'iconfont icon-user',
            '103':'iconfont icon-tijikongjian',
            '101':'iconfont icon-shangpin',
            '102':'iconfont icon-danju',
            '145':'iconfont icon-baobiao'
          },
          //是否折叠
          isCollapse:false,
          //被激活的连接地址
          activePath:'',
          }
      },
      created(){
          this.getMenuList(),
          this.activePath = window.sessionStorage.getItem('activePath')
      },
      methods:{
          logout(){
              window.sessionStorage.clear();//把sessionstora里面的内容全部清空
              this.$router.push('/login')
          },
          async getMenuList(){
        const {data:res} =  await  this.$http.get('menus');
        if(res.meta.status!==200) return this.$message.error(res.meta.msg);
        this.menulist = res.data;
        console.log(res);
          },
          //点击按钮进行折叠和展开
          toggleCollapse(){
               this.isCollapse = !this.isCollapse;
          },
          //保存连接的激活状态
          saveNavState(activePath){
              window.sessionStorage.setItem('activePath',activePath)
             this.activePath = activePath;
          }
      }
  };
  </script>